Roofing compound



25 prepared forthe purpose,

.To all whom it may concern:

Be it known that I, CORNELIUS S. Busm 'NELIqOf New Haven, in the county of New Haven and State of Connecticut, haveinvented.

. Take of sea stone ground substantially to r 5 powder=sixty parE t 0 which add resin 'twenty parts, and to this add of the article Known to commerce as, B. S. fifteen parts, and silicate of soda five par he ingredient is I the sediment derived from petroleum when zo'stan mgin' n s, an w 10 ma rla remove rom e an s, after the oil has been drawn off, is commercially known as B. S.

The several' ingredients, in the proportions above mentioned, are mixed in a suitable tank.

i! to brin the a ts teas; .r tron, a dw hile so'heated the composl ion 15 -UNITEI) STATES CORNELIUS s. BUSHNELL, or mwln vnnjoomincricnr.

P TENT ;OFFICE ROOFING COMPOUND.

SPECIFICATION forming part of Letters Patent No. 389,650, dated eptember 4, 1888.

Application filed July :5, 1898. Serial No. 219.452. (Nospecimens) v trowel or similar instrument and spread upon thereof. a L

Preferably the roof is first covered with pa per; but it may be applied directly to the wood. or upon a surface preliminarilyprepared in any suitable manner. The silicate of soda 'gives to the composition the requisite hardness and fire-proof quality, and the B. S, gives it an elasticity which adapts it to great changes of temperature without cracking or blistering. I r e The proportions which are above stated are believed to produce the best result; but slight variations may-be made in the proportions without departing from the spirit of the invention. r. I claim-.- l I The herein-described composition for roofing, consisting of ground soa. stone, r e s i n, the sediment de d 'Efimwhen standng m nks, commercially known as 'B. 3., 5

ready for application, and it is applied with a and silicate of soda,'m the proportions and "S c 5 \snbs ntially as, escribed. I

.rc onnnnres s. BUSHNELLQH 

